Try running it as an administrator and make sure you have the latest minecraft launcher and the latest version of java.
You can't, unless you know how to use command blocks.
Make sure your console is connected to your TV via a HDMI cable. Without that specific cable, Minecraft will not allow split screen.
Its kind of hard to say but click on this link to the minecraft wiki. It will tell you everything you need: http://www.minecraftwiki.net/wiki/Tutorials/Setting_up_a_server
You launch it from wherever you saved it to.
I didn't make Minecraft.
Yes, the motorcycle is not street legal and they did not make many
Close minecraft and then reopen it. Repeat until working.
Well, you can maybe google minecraft alts. Some of them are actually working. 80% do not work.
There are no keys in minecraft!
Yes it is
Check your internet connection.